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Help with Calculating Projection of consumption based on Historical consumption


I have a requirement to  do a calculation that will inform our client what their consumption  should be based on historical   consumption. The Business user   requested that I   do a linear  regression calculation and provide a  single value which would be considered as a  projected consumption amount for  year 1 and another as projected consumption for year 2. 

This would be based on fields. Totalusage, Username,  YearMonth. The result should be presented as a single value only for  year 1 and a single value for  year 2. So end of 2024 and end of 2025. 

There should be a seaparate projection for  each  client. 

I am not so sure how to go about doing this. There will be no  visual, just a  projected  value entered in a table. I would appreciate   any help to solve this.

Tables: Date( Date, Year-Month), Usage: ( Total Used), Clients( Clientname)

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Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).

Do not include sensitive information or anything not related to the issue or question.

If you are unsure how to upload data please refer to

Please show the expected outcome based on the sample data you provided.

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